spark plug sockets, ratchet, maybe an extension or two. 1 extension 2" long and another 4-6" long usually makes it easy to get to everything for changing spark plugs. 1 tip to not mess up your wires is to pull 1 wire, replace that plug, put wire back on. Move to next spark plug.
You'll want to change these things as they are designed to wear out,
Change oil & filter
Replace Distributor Cap
Replace Rotor under Dist. Cap
Replace Spark Plugs
Replace PCV Valve (most of the time)
Check spark plug wires for cracks and/or dry rot. If they're cracking, replace them asap.
Check your axle levels of lube and ensure they're topped off
Check your coolent levels
Check your power steering fluid level
Check your trans. fluid level (if its an auto)
Check washer fluid level
Check brake fluid level
Check clutch fluid level (if its a manual)
And, get under the front end with a grease gun and grease every Zerk fitting you can find. (tie rod ends, etc...) Then, check your U-Joints for any play and check them for grease fittings as well to hit with the grease gun. 2 U-joints in the rear shaft, 2 in the front shaft and 2 more up front in the axle shafts. (total of 6 u-joints to check for grease fittings and/or to much play in them)
Do the same inspections on all sterring components. Tie rods, ball joints, wheel hubs, etc... check everything for play. Should'nt have a lot of play anywhere. This will tell you what is starting to fail before it actually comes apart on the road or trail.